Longitudinal assessment of periodontal status in patients with nickel allergy treated with conventional and nickel-free braces

Abstract

Objective: To perform a longitudinal comparison of periodontal status in allergic individuals treated with conventional and nickel-free braces. Materials and Methods: Forty-two individuals allergic to nickel were randomly divided into two groups: those receiving conventional braces (n 5 21) and those receiving nickel-free braces (n 5 21). Periodontal status (gingival hyperplasia, change in color and bleeding) was assessed before treatment (T0) and at 3-month intervals for 12 months (T1, T2, T3, and T4), using the Lö e Index. Evaluations were performed blindly by a single, calibrated examiner, followed by prophylaxis and orientations regarding oral hygiene. Data were analyzed using the Mann-Whitney U-test for comparisons of the gingival index between groups and Friedman's test for successive comparisons between sessions in the same group (P # .05). Results: Periodontal status did not differ between groups in the initial 9 months of treatment, whereas significant differences were found at T3 and T4 (.039 and .047, respectively). Individuals wearing conventional appliances had higher mean gingival index scores than those wearing nickelfree braces. Conclusion: Individuals with an allergy to nickel exhibit better periodontal health when treated with nickel-free braces than with conventional braces. (Angle Orthod. 2012;82:653-657.)

Nickel: humoral and periodontal changes in orthodontic patients

“…12 Nickel-free brackets have acquired popularity as an adequate alternative for orthodontic allergic patients. This fact has been corroborated by two recent studies: The first, a systematic review developed by Pazzini et al, 10,11 points out evidences pro-use of nickel free brackets (maximum 2% Ni), although it also highlights the limitation of studies included in the review and the necessity of more consistent evidences. The second study compared longitudinally the periodontal condition of individual treated with traditional and nickel-free brackets.…”

“…[9][10][11][12][13] Periodontal conditions were worst in nickel allergic individuals when compared to the non-allergic throughout treatment. 9 The authors made a longitudinal comparison on the clinical condition of these individuals by means of Löe index for 12 months (one evaluation at every 3 months).…”

NİKEL ALLERJİSİYLE İLİŞKİLİ PERİODONTİTİS: Bir Olgu Sunumu

“…Semptomların hiçbir belirti olmadan da meydana gelebildiği kaydedilmiştir. Güncel prospektif çalışmalar, sistematik derlemeler ve meta analizlerde Ni alerjisi olan ortodonti hastalarının vücut sıvıları ile ilgili özellikler ve periodontal açıdan daha iyi anlaşılmaları için önemli bilgiler sunulmaktadır [12][13][14][15][16] . Ortodontik tedavi gören hastalarda Ni alerjisi olanların periodontal durumunun alerjik olmayanlardan çok daha kötü olduğu gösterilmiştir 12 .…”

In vitro Cr(VI) speciation in synthetic saliva after releasing from orthodontic brackets using silica-aptes separation and GF AAS determination

“…1,6 Most metallic devices used during orthodontic treatment is made of stainless steel type austenitic (AISI type 316L stainless steel), which has 18% (m m -1 ) chromium, 8% (m m -1 ) nickel, 2 to 3% (m m -1 ) molybdenum and low carbon content. 4,5 The corrosion process of metallic brackets has been linked to the deterioration of their mechanical properties and as mentioned above, to adverse biological effects. 6 It is well known that the presence of chromium in an alloy can increase its corrosion resistant properties due to the ability to form a protective oxide film over the metallic surface.…”

“…[1][2][3][4] The corrosion of the orthodontic brackets in the oral environment has concerned the clinicians for two main reasons: (i) the possibility of the body absorb the corrosion products suffering localized or systemic effects; or (ii) the clinical performance of the orthodontic appliances. 4,5 The former is concerned mainly to the toxic effect of Cr(VI), that can be present in the bracket composition or can be interconvert by Cr(III) oxidation in the saliva environment. In the oral environment, orthodontic appliances are potentially exposed to physical damage and chemical agents.…”